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E. B. KUNKLE. SAFETY VALVE.

(No Model.)

No. 446,757. Patented Feb; 17, 1891.

lNl/ENTOf? .4 TTOHNEYS mum mmmm UNITED STATES PATENT @rricn.

ERASTUS ll. KUNKLE, OF FORT IVAYNE, INDIANA, ASSIGNOR TO HIMSELF AND \VILLIAM D. BOSTIVICK, OF SAME PLACE.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 446,757, dated February 17', 1891.

Application filed September 22, 1890. Serial No. 365,819. (No model.)

To all whom. it 71mg concern: slot B is to be disconnected when the regu- Be it known that I, EBAsTUs l3. KUNKLE, of lating-collar is to be actuated.

Fort ayne, in the eountyof Allen and State On the upper end of the valve-body A is of Indiana, haveinventedanew and Improved formed a valve-seat E, on which is adapted 5 Safety-Valve, of which the following is a full, to be seated thevalve F, formed in the shape 55 clear, and exact description. of a cup and guided vertically on a series of My present invention is an improvement ribs G, secured on the inside of the valveupon those for which I have received Letters body A, as plainly illustrated in Fig. 3.

Patent No. 162,831and No.193,411; and it 0011- Imtlre bottom of the cup-shaped valve F is sists in certain novel features of construction formed a recess F, engaged by a point 11, and combination of parts, as hereinafter deformed on the under side of the. disk H, on scribed and claimed. the top of which rests the lower end of the Reference is to be had to the accompanying spring I, extending into the cup-shaped valve drawings, forming a part of this specification, F and engaging with its upper endthe under [5 in which similar letters of reference indicate side of a second disk H provided on its top corresponding parts in all the flgures. with a recess ll, engaged by the pointed end Figure 1 is a sectional side elevation of the J of the regulatingscrew J. The latter improvement. Fig. 2 is a sectional plan view screws into the hub K of a disk K, provided of the same on the line a: 00 in Fig. 1. Fig. 3 on its rim with a downwardly-extending an- 20 is a similar view of the same 011 the line y 1 nular flange G engaging the outer edge of a of Fig. 1. Fig. 4. is a sectional side elevation flange F formed on the upper end of the of a locking device. Fig. 5 is a plan view of cup-shaped valve F. The disk K, with its the locking-nut. Fig. 6 is a side elevation of flange K prevents steam orwater from passa device for regulating the escape of steam. ing to the spring I, as the said disk closes 25 Fig. 7 is a sectional side elevation of the key the upper end of the cup-shaped valve F. for adjusting the screw, regulating the tension The disk K is held centrally in place in the of the spring, and Fig. 8 is a plan view of the cap B by engaging with its flange K lugs or same. wings B, projecting from the cap B. The

The improved safety-valve is provided with hub K of the disk K is provided with an ex- 0 a valve-body A, on the upper end of which is ternal screw-thread KZscrewingin thethreadheld a cap 13, formed semispherica-I, as is ed opening B, formed in the top of the cap plainly shown in Fig. 1, and screwing on a B, as is plainly illustrated in Figs. 1 and t, flange 0, formed at the upper end of the the said hub K being enlarged at its upper valve-body A. The cap B is provided with a end to receive a locking-nut N, screwing onto 3 5 side outlet D, adapted to be connected with a the upper part of the screw J. The nut N is pipe for carrying oft, the steam, the outlet beprovided with a head N, adapted to be ening provided for this purpose with an integaged by a wrench or other convenient tool rior screw-thread, in which is adapted to screw for unscrewing the said lockingn ut from the the outlet-pipe. For large safetywalves the screw J When thelocking-nutN is removed 0 outlet may be provided with an annular flange from the screw J, the latter may be turned adapted to be connected with a similar flange so as to regulate the tension of the spring I formed on the Outleopipe. by applying on the upper end of said screw A drip-pipe connection B is screwed to ca J a cylindrical key L, provided on its inside 13 to screw a pipe into to conduct away the with a lug L, adapted to engage a corre- 45 condensed steam from the valve. A slot 13 spondingly-shaped groove J formed in one is cut into cap 13 under drip-pipe connection side of the screw J. hen the latter ha to give access to a regulatingcollar, hereinbeen adjusted so as to regulate the tension after more fully described,to regulate the acof the spring I, the key I. is removed and tion of the valve when steam-is in the boiler. the nut N is screwed onto the upper end of 50 The drip-pipe connection, which covers the the screw .I, so as to lock the latter in place.

The hub K is locked to the top of the cap B by means of a screw 0, screwing through the top of the cap B into the said hub K, as is plainly illustrated in Fig. 1. In order to additionally lock the screw J in place to prevent its being tampered with, the locking-nut N is provided on the top of its head N with a projection N having a transverse opening N through which is passed the hasp of a padlock of any approved construction. The head N of the nut N is also provided with openingsthrough which are adapted to pass the pins P, passing into corresponding openings formed in the threads K and B of the hub K and cap B. (See Fig. 4.) The upper projecting endsof the pins P are adapted to engage recesses formed in the under side of a washer Q, resting on top of the head N and locked in place by the, bolt of the padlock passed through the opening N of the nut N.

The flange 0, previously mentioned, is also provided with an internal screw-thread, on which screws a collar R, provided on its under side with recesses R, (see Fig. 6,) adapted to be engaged by projections S, formed on a spring S, resting in the space formed between the seat E and the annular flange G. The upper end o't' the collar R is provided with an outwardly-extending flange R provided with notches, as is plainly shown in Figs. 2 and 6, so as to. conveniently apply a suitable tool to screw the collar R up or down to regulate the escape of steam passing through the seat E.

In order to raise the valve F 0d its seat, a pin T is provided, fitted to slide vertically in a suitable recess formed in the valve-body A.

The upper end of the pin T is adapted to engage the under side of the flange F of the valve F, while the lower end of said pin is engaged by aprojection U, formed on the lever U, mounted to turn on a pin U held in lugs V, formed on the valve-body A. Then the lever U is moved in the direction of the arrow to, (see Fig. 1,) the lug U moves the pin T upward, so that the cup-shaped valve F is raised off its seat E, thus permitting the steam to flow through the valve-body A past the collar R and flange K into the cap B, and from the latter through the outlet D.

The regulating-collar R serves to regulate the lifting force of the steam on the extended area of the valve. By screwing the collar up it increases the lifting force of the steam by confining the steam in the port or space between the collar and the upper part of the valve F. By screwing the collar R down the lifting force is diminished.

By hanging the compressing-spring I between the centers J and II all undue friction on the valve F is prevented, as the latter cannot bind on the ribs G of the valve-body A. In order to adjust the tension of the spring I, it is necessary, in case the construction shown in Fig. 1 is used, to remove the nut N and then apply the key-L. In case the construction shown in Fig. 4B is used the padlock has first to be removed, then the collar Q,

then the-pins P, and then the nut N is unscrewed from the upper end of the screw J, after which the key L is applied to adjust the screw J by screwing it up and down in the hub K, so as to regulate the tension of the spring I.

WVhen the spring I is once set and the several parts are put in proper position to lock the screw J in place, the device can hardly be tampered with without it being not-iced by the proper parties.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent v 1. In a safety-valve of the class hereinbefore indicated, the combination, with the valve-body and the semi-spherical or hoodshaped cap B, secured thereto and having a side outlet, of the cup-shaped valve seatedin said body, the helical spring contained in the latter, the vertically-adjustable flanged disk K, having the vertical tubular extension or hub K, which screws through the rounded top of said cap, and the tension-adjusting screw working in said hub, as shown and described.

2. In a safety-valve, the combination, with a valve-body and a cap secured thereto, of a cup-shaped valve held in the said valve-body. a spring pressing on the said valve, a flanged cap screwing in the said valve-body cap and engaging with its flange the upper end of the said valve, and a set-screw screwing in the said flanged cap and connected with the said spring to regulate the tension of the.latter, substantially as shown and described.

3. In a safety-valve, the combination, with a valve-body and a cap secured thereto, of a cup-shaped valve held in the said valve-body, a spring pressing on the said valve, a flanged cap screwing in the said valve-body cap and engaging with its flange the upper end of the said valve, a set-screw screwing in the said flanged cap and connected with the said spring to regulate the tension of the latter, and a cylindrical key provided on its inside with a lug adapted to engage a groove in the said screw to turn the latter,substantiall y as shown and described.

4:- In a safety-valve, the combination, wi h a screw for regulatingthe tension of the spring, of a disk in which screws the said screw, a cap in which screws the hub of the said disk, a lock-nut screwing on the said screw and provided with a head and a lug projecting therefrom and adapted to be engaged by a padlock, pins passing through the said nuthead into the said hub and cap, and a collar held on top of the said nut-headand provided on its under side with recesses engaging the upper ends of the said pins,'substantially as shown and described.

, ERASTUS B. KUNKLE. lVitnesses:

CHARLES 1-I.'WonnEN, T. .l. LOGAN. 

